Patent US2115601A successfully refreshed from Google Patents.
US2115601A
Expired / Lapsed
US
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Heating method and means
Assignee: Landis and Gyr AG
•
Filing: 1932-03-11
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Granted: 1938-04-26
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Expires: 1952-03-11
Abstract
No abstract record available.
Inventors
- 👤 Whitby Ernest
- 👤 Pedler Ivor Augustus Durant
- 👤 Selston Ernest Joseph
- 👤 Newman Arthur Joseph
- 👤 Lester Llewellyn Rolls
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:57
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/18; F24H1/20; F24H1/201; F24H1/202
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1941-04-25 | 1941-10-25 | 1942-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-04-25 | 1945-10-25 | 1946-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-04-25 | 1949-10-25 | 1950-04-26 | $7700.00 | Window Closed / Lapsed |